Pressure member for pressing machines



Mrch 24, 1931. 1,797,758

E. DAVIS PRESSURE MEMBER FOR PRESSING MACHINES Original Filed June 23.1927 2 Sheets-Sheet l www @www fafucjys.

2 Sheets-Sheet 2 March 24, 1931. E. DAVIS PRESSURE MEMBER FOR PRESSINGMACHINES Original Filed June 23. 1927 Patented Mar. 24, 1931 UNITEDSTATES PATENT OFFICE ERNEST DAVIS, OF SYRACUSE, NEW YORK, ASSIGNOR TOTHE PROSPERITY COMPANY INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEWYORK *PRESSURE MEMBER FOR PRESSING MACHINES Application led June 23,1927, Serial No. 200,982. Renewed .Tune 19, 1929.

This invention relates to pressing machines and particularly to apressure member or what for convenience may be termed a hydraulic padfor such machines, which is particularly simple in construction andhighly eiiicient and extremely durable in use.

The invention consists in the novel features and in the combinations andconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a cross sectional view of a presf sure member or hydraulicpad embodying my invention, the contiguous portions of the head and buckof a pressing machine being shown.

Figure 2 is a plan view of said pressure element.

Figure 3 is a cross sectional view of the pad shown in Figure 2.

Figures 4 and 5 are views similar to Figures 1 and 2 of another form ofpad embodying this invention.

This pressing machine is of the type shown in my pending application Sr.No. 199,857, filed June 18, 1927, in which the heavy pressure is appliedthrough a pressure member in the form of a pad on the lower pressingelement or buck of the machine instead of by pressure applied throughmechanism to the head of the pres sing machine. The pad therefore mustdeliver and stand a pressure of approximately 250 lbs. per square inchand hence, the pad is not a pad in the sense of the pads heretofore usedon pressing machines although in addition to applying the heavypressure, it also acts as a pad of an ordinary pressing machine tocompensate for unevennesses as buttons, seams etc., in the garment orother article being pressed.

Also, it differs from other pressure applying means in that it beinghydraulic, the pressure is eqkual throughout the area and is notaffected y unevennesses in the article being pressed and mustnecessarily be equal throughout the entire area of the press head or thegarment on the buck or pressing element or pad regardless ofunevennesses in the garment and'inaccuracies in the press head.

1 designates the buck of a pressing machine, and 2 the head movabletoward and from the buck. Heretofore, as will be understood by thoseskilled in the art, the pressure has been applied solely throughmechanism connected to the head and in the machine 'embodying mypressure member or pad, the

head is merely brought down close to the garment thereon and then theinternal hydraulic pressure applied to the pad to deliver the heavypressure which presses the garment or other article.

The pad comprises a closed or confined flat, flexible and closed tube orbag 3, the walls of which may not be necessarily flat, but may beconvex. Also, they need not be parallel, but the pad is of relativelynarrow thickness or flattened. The pad also is preferably reinforced atits exposed edges by a sheet of fabric 4 and this may be wiremesh clothand preferably of a non-rustable material as Monel metal, built orembedded .in the bag. Also, the upper surface is overlaid with a adding5 of felt or any suitable material. The bag is filled with a hydraulicfluid as oil or water connected through an inlet or nipple 6 to asuitable source of supply which is controlled in any suitable manner. InFigures 1 and 2, the edge walls of the pad are flexible and bulgeoutwardly as the pad is compressed so that the top Wall of the pad isnot retarded at its edges during the compressing operation to anydifferent extent than the rcmainder of the top wall.

By this pressure member or pad, the pressure is substantially equalthroughout the pressure face of the head and also any part of thesurface of the pad or member can be depressed as when the operators handbecomes caught between the head and the pad, but without injury to thehand by the pressure as the hand can be readily pulled out and is notgripped owing to the yielding of the pad and the distribution of thepressure.

In Figures 4 and 5, a similar pad is shown with corrugated side walls 7or side walls in the form of bellows. In these figures, the

bag is shown as of rubber with no reinforcement.

What I claim is:

1. A hydraulic pressure member for pressing machines comprising a flat,flexible, closed bag having an edge Wall flexible so as to flatten underpressure and a non-compressible fluid in said bag.

2. A hydraulic pressure member for pressing machines comprising a flat,flexible, closed bag having an edge Wall flexible so asto flatten underpressure, said bag being formed of reinforced rubber and a hydraulicfluid filling said bag.

3. A hydraulic pressure member for pressing machines comprising a flat,flexible, closed bag having an edge wall flexible so as to flatten underpressure, said bag comprising an inner sack of rubber and an outerreinforcement of metal cloth embodied in the outer surface of the rubberand a hydraulic fluid filling said bag.

4. A pressing member for platen pressing machines comprisin a fiat,flexible, closed bag having top an bottom walls and an edge wallflexible and bowed outwardly between the top and the bottom walls so asto flatten under pressure applied to the top of the bag, and a fluidfilling said bag.

5. A pressing member for platen pressing machines comprising a flat,flexible, closed bag having top and bottom walls and an edge wallflexible and bowed outwardly between the top and bottom walls so as toflatten under pressure applied to the top wall, said edge wall beingformed of reinforced rubber, the reinforcement extending around theentire margin of the bag and terminating at the top and bottom wallsthereof, and a fluid filling the bag.

6. A pressing member for platen pressing machines comprising a flat,flexible, close bag having an edge wall flexible so as to atten underpressure applied to the top of the bag, said bag comprising an innercomplete sack of rubber having top and bottom walls and an edge wall andan outer reinforcement of wire mesh cloth embodied in the outer surfaceof the rubber and extending around the entire margin of the bag and afluid filling the bag.

7 In a pressing machine, the combination of a buck, a pressing membermounted on the face of the buck comprising a complete fiat, flexible,closed bag composed of to and bottom walls and an edge wall and avingits bottom resting on the face of the buck and having its edge wallflexible so as to flatten under pressure and a fluid filling the bag.

8. In a pressing machine, the combination with upper and lower pressingelements, of a flat, flexible closed bag arranged upon the bottompressing element and composed of top and bottom walls and an edge wall,the top and bottom walls being of asize-to lie within

